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Tropical Depression Five strengthens into Tropical Storm Dorian, and may be hurricane soon

14. Boston, MA • Total properties at risk of hurricane damage: 126,196 • Reconstruction cost value of properties: $34.9 billion • Metro area population: 4.9 million • Recent severe hurricane: Bob (1991) Though Boston may not immediately spring to mind when thinking of hurricanes, the city's proximity to the Atlantic Ocean and high population density make it especially susceptible to damage from serious storms. In August 1991, Hurricane Bob caused $1.5 billion in damages across New England. The densely populated Boston metro area now has more than 126,000 homes at risk of significant damage from a storm surge. ALSO READ: The Best and Worst Prepared States for Weather Emergencies SeanPavonePhoto / Getty Images

12. Charleston, SC • Total properties at risk of hurricane damage: 155,740 • Reconstruction cost value of properties: $40.9 billion • Metro area population: 787,643 • Recent severe hurricane: Hugo (1989) The Charleston-North Charleston metropolitan area is home to more than 787,000 people, one of the state's largest urban areas. Many long-term residents of the coastal city know first-hand just how damaging a serious hurricane can be. Hurricane Hugo -- the eye of which passed slightly north of Charleston Harbor in 1989 -- caused more than $7 billion in total damages and destroyed 26,000 homes across the Carolina Lowcountry. ALSO READ: Cities With the Best Weather Sean Pavone / Getty Images

11. Philadelphia, PA • Total properties at risk of hurricane damage: 166,444 • Reconstruction cost value of properties: $43.3 billion • Metro area population: 6.1 million • Recent severe hurricane: Sandy (2012) Philadelphia is one of the country's most densely populated cities and, while somewhat protected by New Jersey, is relatively close to the Atlantic. In addition, because of the city's prominent rivers and tributaries and the advanced age of much of its infrastructure more than 166,000 properties within the metropolitan area are at risk of damage from a hurricane's storm surge. The estimated reconstruction cost of such damage would be more than $43 billion. Sean Pavone / Getty Images

10. Jacksonville, FL • Total properties at risk of hurricane damage: 176,509 • Reconstruction cost value of properties: $41.1 billion • Metro area population: 1.5 million • Recent severe hurricane: Irma (2017) Located on Florida's northeast coast, Jacksonville is one of many cities in the state where billions of dollars of property is at risk of storm surge damage from a serious hurricane. Hurricane Irma led to severe flooding in the city in 2017, despite the storm hitting Florida's Gulf Coast. The storm pushed water from the Atlantic into the St. Johns River, causing floods 4 to 6 feet deep in certain areas. ALSO READ: States With the Most Tornadoes TraceRouda / Getty Images

9. Naples, FL • Total properties at risk of hurricane damage: 187,205 • Reconstruction cost value of properties: $42.2 billion • Metro area population: 378,488 • Recent severe hurricane: Irma (2017) Hurricane Irma left some residents of Naples without water and electricity for days. A powerful storm could indeed be exceedingly damaging in the city, which is located on the southern portion of Florida's Gulf Coast. With high home values there, the financial damage can be in the tens of billions. According to real estate website Zillow, the city has the highest home values in the state. benedek / Getty Images

8. Bradenton, FL • Total properties at risk of hurricane damage: 262,745 • Reconstruction cost value of properties: $53.8 billion • Metro area population: 821,573 • Recent severe hurricane: Hermine (2016) Bradenton, Florida, which together with Sarasota forms the Sarasota metropolitan area, is located on Florida's western coast, just south of Tampa Bay. The area managed to avoid major damage during Irma, but more than a quarter-million homes remain at risk of flooding. Bradenton is also susceptible to flooding from the Manatee River, which runs alongside it. ALSO READ: America’s Richest Beach Towns Murmakova / Getty Images

7. Houston, TX • Total properties at risk of hurricane damage: 294,188 • Reconstruction cost value of properties: $63.8 billion • Metro area population: 7.0 million • Recent severe hurricane: Harvey (2017) The Houston metropolitan area is home to 7 million people. The area's ongoing urban sprawl is one reason Hurricane Harvey -- which is estimated to have caused $125 billion in damages and killed 68 people -- was so calamitous. Nearly $64 billion worth of property is at risk of storm surge damage in Houston, the greatest amount in all of Texas. Sean Pavone / Getty Images

6. Fort Myers, FL • Total properties at risk of hurricane damage: 329,479 • Reconstruction cost value of properties: $67.6 billion • Metro area population: 754,610 • Recent severe hurricane: Irma (2017) Fort Myers is located along the Caloosahatchee River in southwest Florida. It is also a part of the Cape Coral-Fort Myers metro area, which is among the fastest growing areas in the country based on population. During Hurricane Irma, 35,000 people in Fort Myers' Lee County went to shelters. Currently, nearly 330,000 homes are considered at risk of flooding due to hurricanes. ALSO READ: Beach Towns That Will Soon Be Under Water fotoguy22 / Getty Images

5. Virginia Beach, VA • Total properties at risk of hurricane damage: 391,365 • Reconstruction cost value of properties: $94.8 billion • Metro area population: 1.7 million • Recent severe hurricane: Matthew (2016) Virginia Beach and the surrounding Chesapeake Bay area are becoming increasingly predisposed to flooding as land in the area is sinking. Flooding from Hurricane Matthew damaged at least 1,400 homes across the city in 2016. This was due in part to insufficient drainage infrastructure. More than 391,000 properties are now at risk of damage from flooding. Davel5957 / Getty Images

4. New Orleans, LA • Total properties at risk of hurricane damage: 399,403 • Reconstruction cost value of properties: $100.9 billion • Metro area population: 1.3 million • Recent severe hurricane: Katrina (2005) The tragic events of Hurricane Katrina in 2005 fully demonstrated New Orlean's vulnerabilities. The city's flood walls failed to protect it from the Category 3 storm, which contributed to $125 billion in damages and the deaths of 1,577 Louisiana residents. While the city now has some of the nation's strongest environmental protections, there are still nearly 400,000 properties at risk of flooding due to hurricanes, according to CoreLogic. ALSO READ: Most Powerful Hurricanes of All Time SeanPavonePhoto / Getty Images

3. Tampa, FL • Total properties at risk of hurricane damage: 465,644 • Reconstruction cost value of properties: $84.1 billion • Metro area population: 3.1 million • Recent severe hurricane: Charley (2004) Tampa is located relatively close to Bradenton on Florida's Gulf Coast and is likewise exposed to storms entering the Gulf. Many of the city's residents live near the coast, increasing the risk of property damage from flooding. In 2004, Hurricane Charley caused $16 billion in damages after making landfall as a Category 4 storm just south of Tampa. Sean Pavone / Getty Images

2. New York, NY • Total properties at risk of hurricane damage: 731,137 • Reconstruction cost value of properties: $283.3 billion • Metro area population: 20.0 million • Recent severe hurricane: Superstorm Sandy (2012) New York City is home to some of the most expensive real estate in the country. It is also, along with the surrounding areas that make up the New York metropolitan area, home to 20 million people -- the largest metro area in the country. While New York is less hurricane-prone than a state like Florida, New York City's coastal properties -- combined with the tendency of storms to widen as they move north -- make it highly vulnerable to surge risk and damage. According to The National Oceanic and Atmospheric Administration, Superstorm Sandy caused at least $70 billion in damages in 2012. ALSO READ: Before and After Pictures of the Worst Hurricanes in American History Eloi_Omella / Getty Images

1. Miami, FL • Total properties at risk of hurricane damage: 791,775 • Reconstruction cost value of properties: $157.7 billion • Metro area population: 6.2 million • Recent severe hurricane: Andrew (1992) Of all U.S. metropolitan areas, Miami has the most homes at risk of flooding from a hurricane, with more than 791,000 vulnerable properties. The area's risk will continue to increase as its population grows and developers continue to build along its 20 miles of coastline. Despite its coastal location in Southeast Florida, Miami has avoided a serious encounter with a hurricane for many years. Historically, it has not been so lucky. In August 1992, Hurricane Andrew hit South Florida as a Category 5 storm with wind speeds of 165 miles per hour. There 26 people killed, more than 25,500 homes were destroyed, and over 100,000 additional homes were damaged, while 250,000 people were displaced. The results could be much worse were a similar storm hit the area today. Art Wager / Getty Images

The fourth tropical storm of the 2019 Atlantic hurricane season formed Saturday afternoon, according to the National Hurricane Center.

Tropical Storm Dorian is 725 miles east-southeast of Barbados, is moving west near 12 mph and is expected to continue this motion tonight. A turn toward the west-northwest is forecast Sunday through Tuesday.

There are no coastal watches or warnings in effect.

Its maximum sustained winds are 40 mph.

Dorian could strengthen into a hurricane Tuesday.

Forecasters identified the Tropical Depression early Saturday morning, after it formed about 805 miles east-southeast of Barbados.

A turn toward the west-northwest is forecast on Sunday, and that motion is expected to continue through Tuesday. On the forecast track, the tropical storm is expected to be near the central Lesser Antilles on Tuesday.